Chemisty A Final Flashcards
Intensive properties
Intensive properties do not depend on the amount of matter that is present. Examples of intensive properties include boiling point, density and state of matter.
Extensive properties
Definition: An extensive property is a property of matter that changes as the amount of matter changes.
Examples: Mass and volume are extensive properties. As more matter is added to a system, both mass and volume changes.
Gaseous physical state
Variable shape
Liquid physical
Variable volume
Compressable
Fixed shape
IT IS NONE OF THESE
Solid to liquid
Melting
Solid physical
Variable volume
Compressible
Variable shape
ITS NONE OF THESE
Heterogeneous mixture
A heterogeneous mixture is simply any mixture that is not uniform in composition – it’s a non-uniform mixture of smaller constituent parts. Using various means, the parts in the mixture can be separated from one another.
Ex: mixed nuts and sand
Homogeneous mixture
A homogeneous mixture is a mixture where the components that make up the mixture are uniformly distributed throughout the mixture. The composition of the mixture is the same throughout. There is only one phase of matter observed in a homogeneous mixture.
Ex. Tap water, sugar water, air
SiO2
Compound
Li
Element
Chemical change
Digesting a hotdog
Physical change
Properties that can be observed or changed without changing its identity.
Oxidation of iron in the air
Chemical change
Au
Element
91,000,000
9.10e7
9.8x10^5
980000
.00000036
3.6x10^-7
Significant figures in .09445
4
Significant figures in .0020
2
Significant numbers in 5,974
4
Significant figures in 30,000
1
Round 25,225 to 3 significant figures
25,200
Who discovered the electron
Thompson
A proton has a positive charge and and a mass of aprox. ____
1 amu
By what process does thorium 230 decay to radium 226
Alpha emission
Example of physical change
Grinding pepper
Solid physical state
Fixed shape
Beta particle
0
-1 e
Electrons in a subshell have ______ energies
Equal
What compounds have generally low melting points
Molecular
What compound has high melting points
Ionic
N2+h2=NH3
Combustion/ synthesis
CH+O2=CO2+H2O
Combustion
What compounds are soluble in water
Ionic
